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All of the following are evidence supporting the theory of plate tectonics EXCEPT for ________.

Which type of plate boundary occurs where two plates move apart, resulting in upwelling and partial melting of hot material from the mantle?

In an igneous rock with a(n) ________ texture, the mineral grains are visible to the unaided eye.

What are volatiles?

When gas bubbles escape as lava solidifies, a ________ texture is formed.

________ denote positively charged, nuclear particles.

________ are the largest intrusive igneous bodies.

All silicate minerals contain ________ and ________.

By the early Cenozoic era, Australia had separated from ________.

All silicate minerals contain ________ and ________.